Viscosity-testing-apparatus.



H. F. BAUER.

VISCOSITY TESTING APPARATUS.

APPLICATION FILED SEPT- 25 15H5*-v Patented July 4, 191( other suitable material, andsaid milieus` shown, is orovidedhelow its; upper end with a, level indicating mark Sand `atits upper y endis provided. With :i veut top 9 which is,`

' pziratus,

`cation.

'Heirs .El BAUEBI er `CEDAR RAPIDS; IOWA.

i o iviscosrrizfqresrme Primeros i f "nppiieaiioa sieri september 25, 1915. sereine'. 52,547.

Lejjit known that l, HANS .-F;BA UER', a citizen or" the Unitedv States, ,residing at Cedar Rapids2 in the county of Linn: and` State of o'iveg have invented new and useful improvements in Viscosity-.Testing Apand solutions of the saine general ehariicterl fthe object of ,thefiiiirention is toprovide an apparatus of 'the .character set forth by The invention consists f'thefe: ures of construction; eoinblniitiion an of parte herein fully described n d'fclaiined, f

' ietereneeheinghad to the accompanying sii . adjustable Supporting ring i suitable length and di'anfietei* 'andispro-p vided at its lower end with a constricted disdrawing; in which? i o y f Figure 1 isa side elevatio'irof'aiiappaA :fetus v'of/the character statedenibody'ng my ini'entioiii, Fig..r is a vertical section through" the test "tube or, column and the i n an enlarged 4detail View 'of e portion ofthe test tube. f

friasld Fig, 3 1s in carrying vmy f nvention into practice',r l. provide supporting uprightl cfanysuit-VIV able type, Wiich extends' upward from .a logies 2, and Whiehsie provided with e desired` n v I 'stareh-withla given amount of 1% of sodium 90 Y number of adjustable arms or brackets y for supporting' a vertically `adjustable testtube .4. The upright l isalsoprovidedwith an hereinafter i described. yThe tube Luis of the outflow et aY predetermined quantity of fluid within agiventiine, This outlet com# l munieates withostop cock, 7,wlii`ch is ein7 ployed as a cut-ofandnhasia discharge pas-y sage of suiiici'entdiameter to lprevent intel ference through the aperture '6.

The test tiiher and its parts ere Dreier-ably@ 'made of glass,i but may he iiiafoleofv agdepted to be opened to permitof the dis-1 of which the following isaspeeili- 5 ttor ay purpose 4 with the` free outlowof the liquid Specification 0f lettere Patent `Paiteiiited J'iilyllil.

is being lilledgfand of`being subsequently closed to conine tliecolunin oiyliquid and. y forniaii air eushioiilto prevent fluctuations in. the, coluninf as;y hereinafter. fully. de-

scribed: i l i Communicating'[with the ytube 4 'iminedif ately below ythe indicating niark 8 is an Aiii-v letl() connected with a filling: cup Il whicl'i 'is Lof a diameter to; loosely receiije tll'ie ordi- G5 'nary rubber tubel upon the neckpoi-:tiony ldfof an inverted Hash' 14 adaptedpto lie held inthe ringcfi. f f

The apparatus `iii-ay other siinilar i liquide or soli'itioiis,i butfor thepurpose of explaining, the'i'ipferatioii of` the' apparatus its use .in deteifniining' the e viscosity oflinodified starchinay be Aset `forth `as jan: eifai-iiple. f As is well known,` when starch is treated :with a moderately strong alkali solution of sodium hydra-te itltliickens and ,assumes soine'whatr the `consistency 'of i tliiekstarch paste. The sodiumiliydrateso 80 noted in untreated starches, v when boiled 854 with Water the untreated starches heilig` thick boiling. The exteiit to whficlija starch yhas beenV altered or rendered tliinlioilihg is determined by treating a `known aniountfof hydrate solutiongfree Jroin carbonate of soda and ioinparing its fluidity or'viseosity with thatfof Water at a. temperature 01275" F.. `and noting how inuch 'will pass through in this manner'.

In practice, about twenty grains of the:`

`@starch to he tested isjdried at a 'temperature 100 of aloout'ZOO" F. `rNine grains of the `dried 4 1 starch` 'then 'iif'eigl'ied out, placed-in a heather, and to this is added .20 cel distilled.` i water., a stirring .rod heingfemploy'ed to j lbreak up all sniall particles of starch and 1057` tese-eure ai thorough iiiixti'ii-e. To thetlsolu tion thusfohtained is then added 18'0fcfcQ'0 ina' sodium hydrate solution at "1'5"y F'.,ftlie, mixture being stirred gently to* about three which may haven ca iicityof sa'yf 250 coin,A

iiievsolutio'n is then i lowed to stiindexaetly be eiiiiiloyedifor de-- teriniiiing ther fluidity or'viseosity olany 70` oi the vliquids or solutions menti'oi-iedgfor` tube lf hating between such niark and the4 lidi tube l2 and inserting the flask into the ring u and the rubber tube into the cup 1l, Sullicicnt space being provided within the cup for the indou' ol? air to the flask to take the place uit the solution discharging therefrom `into the cup. The tube 12 is then relapsed so to allori' the cup 11 and tube 4 to fill up to the level olf the indicating mark 8, the

outlet 6 a containing capacity of 100 ccm. This filling of the tube und cup to the point indicated is obtained by closing the cock 7 and opening the cock 9 to permit the tube 4 to fill, citer which the cock 9 is closed to seal the upper cud of the tube, the cock 7 opened to allow any excess of solution above the niark tl to discharge .and then closed. The apparatus being thus set for operation,

. the coclr Y is opened to allow the solution to flow through the outlet 6 into a graduated receiver l5 supported upon the basebelow und inalincnient with the tube, and which receiver may have the saine masuring or containing capacity as the. flask. .The appa ratus haring previously been calibrated by introducing E250 cc. distilled Water at 75 F.

into the tia slr la and observing the time that it taires for 100 cc. of the water to run out,

it is evident that the number of cc. starch solution running out in the same length of time will indicate the fluidity orviscosity of the starch. For instance, if 100 cc. of Water at a temperature of 75 F. runs through the apparatus in thirty-five seconds, and @10 col ol. the starch solution at 75 F. runsthrough the apparatus in an equivalent amount 0f time, it is evident that` the fluidity or vis cosity of the starch istil). 'The fluidity or viscosity is talrcn' at c 10% moisture basis, nine grains of the dried starch usedin the test being equal to a 10% moisture basis.

It will be obvious from the foregoingdescription that my invention provides an apparatus by which the fluidity or viscosity of liquids oithc statedcharacter may be convenicntly, quickly and accurately detern'iincd.

-Zllic advantinrcs of my improved apparatus, in addition to its simplicity, are, first, that the outlowing solution at the outlet 6 is always under a constant head or pressure,

Liconsa secondly, that an `accurate, measurement of the liquid may be obtained by the useof the coclr 9 in bringing the solution to the level 8,

before starting the test, third, when 4the cock 9 is closed, after bringing the solution to the point 8 an air cushion exists betweenthe point and surface of the liquid at the point 8 which prevents any fluctuation of the solu.

,of operation and` accuracy thus beingr insured.

I cla1m i l. An apparatus for testing the fluidity or viscosity of liquids comprising a test tube having a vent coclr at its upper end, a valve outleft at its lower end, a filling cup disposed parallel with and adjacent to the upper end of the tube, a lateral inlet connecting the tube with thelower end of said filling cup, and un indicating inark disposed above and in proximity to Vsaid inlet connection.

2. An apparatus for determining the fluidity or viscosity of liquids, comprisingn support, a test tube carried by the support, and having a vent cock :it its upper end, a valved outlet at its lower end, a lateral inlet `adjacent to but below its upper end, a liquid level indicating merli disposed above and adiacent to said inlet, and a holder carried by the support to contain a vessel from which the cup is to be filled. D

3. An apparatus for determining 'the fluidity or viscosity of liquids comprising a test tube having a vent cock at its upper end,

a valved outlet at its lower end, an inlet disposed adjacent to but below its upper end, a liquid level indicating;r mark disposed above and adjacent .to said inlet, und a tilling cupcommunicating with the. inlet.

4. An apparatus for determining the fluidity or viscosity of liquids, comprising a support, a test tube carried by the support and having a vent cock at its upper end a valved outlet at its lower end, a lateral inlet adjacent to but below its upper end, a liquid level indicating mark disposed aboveand i adjacent to said inlet, and a filling cup; con municating with the inlet, and a flask car-` ried by 'the support and having a neck portion depending into 'said lling cup.

In testimony vwhereof l avflx my signature in presence of two witnesses. i

HANS l?. BAUER. Witnesses:

Eve., Snnniran, Jarras J. Laminier.

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